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Bollu A, Giri P, Dalabehera NR, Asmi AR, Sharma NK. Unnatural Amino Acid: 4-Aminopyrazolonyl Amino Acid Comprising Tri-Peptides Forms Organogel With Co-Solvent (EtOAc:Hexane). Front Chem 2022; 10:821971. [PMID: 35601543 PMCID: PMC9117720 DOI: 10.3389/fchem.2022.821971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 03/29/2022] [Indexed: 11/26/2022] Open
Abstract
Ampyrone is an amino-functionalized heterocyclic pyrazolone derivative that possesses therapeutic values such as analgesic, anti-inflammatory, and antipyretics. The chemical structure of ampyrone exhibits excellent hydrogen bonding sites and is considered as the potential scaffold of supramolecular self-assembly. Recently, this molecule has been derived into unnatural amino acids such as aminopyrazolone amino acid and its peptides. This report describes that one of its amino acids, O-alkylated ampyrone, containing hybrid (α/β) peptides forms organogel after sonication at 50–55°C with 0.7–0.9% (w/v) in ethyl acetate: hexane (1:3). The formation/morphology of such organogels is studied by nuclear magnetic resonance Fourier-transform infrared (FT-IR), circular dichroism (CD), scanning electron microscope (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (Powder-XRD), and thermogravimetric analysis (TGA). Energy-minimized conformation of APA-peptides reveals the possibility of intermolecular hydrogen bonding. Hence, APA-peptides are promising peptidomimetics for the organogel-peptides.
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Affiliation(s)
- Amarnath Bollu
- National Institute of Science Education and Research (NISER), Bhubaneswar, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Prajnanandan Giri
- National Institute of Science Education and Research (NISER), Bhubaneswar, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Nihar Ranjan Dalabehera
- National Institute of Science Education and Research (NISER), Bhubaneswar, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Asmita Rani Asmi
- National Institute of Science Education and Research (NISER), Bhubaneswar, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Nagendra K Sharma
- National Institute of Science Education and Research (NISER), Bhubaneswar, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
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2
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Li X, Zhang H, Liu L, Cao C, Wei P, Yi X, Zhou Y, Lv Q, Zhou D, Yi T. De novo design of self-assembly hydrogels based on Fmoc-diphenylalanine providing drug release. J Mater Chem B 2021; 9:8686-8693. [PMID: 34617098 DOI: 10.1039/d1tb01628h] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Short peptides with self-assembled nanostructures are widely applied in the areas of drug delivery systems and biomaterials. In this article, we create a new peptide-based hydrogelator (Fmoc-FFRRVR) based on N-fluorenylmethoxycarbonyl-diphenylalanine (Fmoc-FF) through an approach to improve its hydrophilicity. Compared to Fmoc-FF, Fmoc-FFRRVR prefers to form a hydrogel under mild conditions, and the gelation time is only 2 s. Fmoc-FFRRVR self-assembles into organized arrays of β-sheets in nanofibers via π-stacking of Fmoc-FF, which are supported by circular dichroism and fluorescence emission spectroscopy. Rheology results confirm that the hydrogel of Fmoc-FFRRVR is elastic, reversible and injectable. The newly discovered hydrogel not only retains some excellent performances of Fmoc-FF, but also can be used as a drug carrier for biomedical applications.
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Affiliation(s)
- Xiang Li
- Department of Chemistry, Fudan University, Shanghai 200438, P. R. China. .,School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China. .,China School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, P. R. China.
| | - Huijun Zhang
- Department of Chemistry, Fudan University, Shanghai 200438, P. R. China.
| | - Lingyan Liu
- Department of Chemistry, Fudan University, Shanghai 200438, P. R. China.
| | - Chunyan Cao
- Department of Chemistry, Fudan University, Shanghai 200438, P. R. China.
| | - Peng Wei
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, P. R. China
| | - Xin Yi
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, P. R. China
| | - Yifeng Zhou
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China.
| | - Qingyang Lv
- China School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, P. R. China.
| | - Dongfang Zhou
- China School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, P. R. China.
| | - Tao Yi
- Department of Chemistry, Fudan University, Shanghai 200438, P. R. China. .,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, P. R. China
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Sanderson JM. Far from Inert: Membrane Lipids Possess Intrinsic Reactivity That Has Consequences for Cell Biology. Bioessays 2020; 42:e1900147. [PMID: 31995246 DOI: 10.1002/bies.201900147] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 12/06/2019] [Indexed: 12/19/2022]
Abstract
In this article, it is hypothesized that a fundamental chemical reactivity exists between some non-lipid constituents of cellular membranes and ester-based lipids, the significance of which is not generally recognized. Many peptides and smaller organic molecules have now been shown to undergo lipidation reactions in model membranes in circumstances where direct reaction with the lipid is the only viable route for acyl transfer. Crucially, drugs like propranolol are lipidated in vivo with product profiles that are comparable to those produced in vitro. Some compounds have also been found to promote lipid hydrolysis. Drugs with high lytic activity in vivo tend to have higher toxicity in vitro. Deacylases and lipases are proposed as key enzymes that protect cells against the effects of intrinsic lipidation. The toxic effects of intrinsic lipidation are hypothesized to include a route by which nucleation can occur during the formation of amyloid fibrils.
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Zottig X, Al-Halifa S, Babych M, Quittot N, Archambault D, Bourgault S. Guiding the Morphology of Amyloid Assemblies by Electrostatic Capping: from Polymorphic Twisted Fibrils to Uniform Nanorods. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901806. [PMID: 31268238 DOI: 10.1002/smll.201901806] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/31/2019] [Indexed: 06/09/2023]
Abstract
Peptides that self-assemble into cross-β-sheet amyloid structures constitute promising building blocks to construct highly ordered proteinaceous materials and nanoparticles. Nevertheless, the intrinsic polymorphism of amyloids and the difficulty of controlling self-assembly currently limit their usage. In this study, the effect of electrostatic interactions on the supramolecular organization of peptide assemblies is investigated to gain insights into the structural basis of the morphological diversities of amyloids. Different charged capping units are introduced at the N-terminus of a potent β-sheet-forming sequence derived from the 20-29 segment of islet amyloid polypeptide, known to self-assemble into polymorphic fibrils. By tuning the charge and the electrostatic strength, different mesoscopic morphologies are obtained, including nanorods, rope-like fibrils, and twisted ribbons. Particularly, the addition of positive capping units leads to the formation of uniform rod-like assemblies, with lengths that can be modulated by the charge number. It is proposed that electrostatic repulsions between N-terminal positive charges hinder β-sheet tape twisting, leading to a unique control over the size of these cytocompatible nanorods by protofilament growth frustration. This study reveals the high susceptibility of amyloid formation to subtle chemical modifications and opens to promising strategies to control the final architecture of proteinaceous assemblies from the peptide sequence.
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Affiliation(s)
- Ximena Zottig
- Chemistry Department, Université du Québec à Montréal, Montreal, Québec, H2L 2C4, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications PROTEO, Québec, G1V 0A6, Canada
| | - Soultan Al-Halifa
- Chemistry Department, Université du Québec à Montréal, Montreal, Québec, H2L 2C4, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications PROTEO, Québec, G1V 0A6, Canada
| | - Margaryta Babych
- Chemistry Department, Université du Québec à Montréal, Montreal, Québec, H2L 2C4, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications PROTEO, Québec, G1V 0A6, Canada
| | - Noé Quittot
- Chemistry Department, Université du Québec à Montréal, Montreal, Québec, H2L 2C4, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications PROTEO, Québec, G1V 0A6, Canada
| | - Denis Archambault
- Department of Biological Sciences, Université du Québec à Montréal, Montreal, Québec, H2X 1Y4, Canada
- Swine and Poultry Infectious Diseases Research Center, CRIPA, Québec, J2S 2M2, Canada
| | - Steve Bourgault
- Chemistry Department, Université du Québec à Montréal, Montreal, Québec, H2L 2C4, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications PROTEO, Québec, G1V 0A6, Canada
- Swine and Poultry Infectious Diseases Research Center, CRIPA, Québec, J2S 2M2, Canada
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Bollu A, Sharma NK. Synthesis and Conformational Analysis of Aminopyrazolonyl
Amino Acid (APA)/Peptides. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801640] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Amarnath Bollu
- School of Chemical Sciences; National Institute of Science Education and Research (NISER)-Bhubaneswar; Jatni campus 752050 (Odisha) Bhubaneswar- India & HBNI-Mumbai, Mumbai India
| | - Nagendra K. Sharma
- School of Chemical Sciences; National Institute of Science Education and Research (NISER)-Bhubaneswar; Jatni campus 752050 (Odisha) Bhubaneswar- India & HBNI-Mumbai, Mumbai India
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Babych M, Bertheau-Mailhot G, Zottig X, Dion J, Gauthier L, Archambault D, Bourgault S. Engineering and evaluation of amyloid assemblies as a nanovaccine against the Chikungunya virus. NANOSCALE 2018; 10:19547-19556. [PMID: 30324958 DOI: 10.1039/c8nr05948a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The design of nanoparticles exposing a high density of antigens constitutes a promising strategy to address safety concerns of conventional life-attenuated vaccines as well as to increase the immunogenicity of subunit vaccines. In this study, we developed a fully synthetic nanovaccine based on an amyloid peptide sequence with high self-assembling properties. The immunogenic epitope E2EP3 from the E2 glycoprotein of the Chikungunya virus was used to evaluate the potential of a 10-mer peptide derived from an endogenous amyloidogenic polypeptide as a novel vaccine platform. Chimeric peptides, comprising the peptide antigen attached to the amyloid core by a short flexible linker, were prepared by solid phase synthesis. As observed using atomic force microscopy, these polypeptides self-assembled into linear and unbranched fibrils with a diameter ranging from 6 to 8 nm. A quaternary conformation rich in cross-β-sheets characterized these assemblies, as demonstrated by circular dichroism spectroscopy and thioflavin T fluorescence. ELISA assays and transmission electronic microscopy of immunogold labeled-fibrils revealed a high density of the Chikungunya virus E2 glycoprotein derived epitope exposed on the fibril surface. These amyloid fibrils were cytocompatible and were efficiently uptaken by macrophages. Mice immunization revealed a robust IgG response against the E2EP3 epitope, which was dependent on self-assembly and did not require co-injection of the Alhydrogel adjuvant. These results indicate that cross-β-sheet amyloid assemblies constitute suitable synthetic self-adjuvanted assemblies to anchor antigenic determinants and to increase the immunogenicity of peptide epitopes.
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Affiliation(s)
- Margaryta Babych
- Department of Chemistry, Université du Québec à Montréal, Montréal, QC, Canada.
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Burra G, Thakur AK. Insights into the molecular mechanism behind solubilization of amyloidogenic polyglutamine‐containing peptides. Pept Sci (Hoboken) 2018. [DOI: 10.1002/pep2.24094] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Gunasekhar Burra
- Department of Biological Sciences and BioengineeringIndian Institute of Technology Kanpur Kanpur‐208016 India
| | - Ashwani Kumar Thakur
- Department of Biological Sciences and BioengineeringIndian Institute of Technology Kanpur Kanpur‐208016 India
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Gorantla NV, Shkumatov AV, Chinnathambi S. Conformational Dynamics of Intracellular Tau Protein Revealed by CD and SAXS. Methods Mol Biol 2017; 1523:3-20. [PMID: 27975241 DOI: 10.1007/978-1-4939-6598-4_1] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A native conformation of a protein is essential for its biological role. In certain conditions, some proteins show non-native conformations, leading to aggregation, which in turn may produce severe pathologies. Such physiological conditions are classified as protein misfolding diseases. Alzheimer's disease (AD) is the most common form of dementia. Extracellular senile plaques formed by Amyloid β and intracellular aggregates formed by microtubule-associated protein Tau (MAPT) are the hallmarks of AD. Physiological role of MAPT is to maintain the integrity and stability of microtubules, however it tends to self-aggregate forming intracellular paired helical filaments (PHFs) during AD. MAPT is also subjected to various post-translational modifications such as phosphorylation, glycosylation, truncation, and acetylation. Being natively unfolded, MAPT is prone to full characterization at atomic level. Small-angle X-ray scattering (SAXS) is often applied in combination with other biophysical methods, like nuclear magnetic resonance (NMR), circular dichroism (CD), fluorescence spectroscopy, analytical ultracentrifugation (AUC), or dynamic light scattering (DLS) to characterize natively unfolded systems. Here we describe the practical aspects of MAPT characterization by SAXS and CD in detail as well as outline the inferred structural and functional implications.
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Affiliation(s)
- Nalini Vijay Gorantla
- Neurobiology Group, Division of Biochemical Sciences, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, 411008, Pune, Maharashtra, India.,Academy of Scientific and Innovative Research (AcSIR), 10025, New Delhi, India
| | | | - Subashchandrabose Chinnathambi
- Neurobiology Group, Division of Biochemical Sciences, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, 411008, Pune, Maharashtra, India. .,Academy of Scientific and Innovative Research (AcSIR), 10025, New Delhi, India.
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